Fastify
How vibe coders and indie builders use Fastify: 30 projects built with it since May 2026.
Projects built with it
30
Share of stated stacks, 4 wks
0.2%
Last 4 weeks vs 8 before
too few to tell
Add-ons built for it
0
Share of stated stacks, per week
Share rather than counts, so changes in how many posts a subreddit lets through don't show up as trends.
Often used with
- PostgreSQL 13
- TypeScript 11
- React 8
- Node.js 8
- SQLite 7
- Docker 6
- Drizzle 4
- Stripe 4
What's built with it
Latest projects built with Fastify
- Kosmora — Turns Wikipedia articles into collectible cards whose rarity is set by page views, with packs, trading, auctions and daily challenges.“i built a card game that turns wikipedia into 55k collectible cards”
- bestfilmsof — Ranks each year's films by a blended 0-100 score from audience, critic, Academy and box office data.“I wanted to watch the best film of every year since I was born, so I built a site that ranks them”
- Fieldplate — Combines lead intake, quoting with roof sketches, e-signatures, crew time clocking, job photos, inventory, invoicing and payments for roofing jobs in one web app.“I built one app to replace the five a local roofing company was paying for. It's free while I find out what's wrong with it.”
- What would you realistically… — Lets people exchange physical goods directly with each other without money changing hands.“What would you realistically price this almost finished marketplace-style web product?”
- AegisFlow — Sits between an app and LLM APIs, masks PII in prompts before they are sent, restores the real values in responses, and writes a signed audit log.“Built an open-source PII masking proxy for LLM APIs, trying to validate if there's a B2B market for a hosted version”
- Sweep — Searches multiple online stores at once for a product and tracks price history to flag fake sales.“I'm 16 and I just shipped my first real app: a price tracker that tells you when a "sale" isn't actually a sale”
- MapyVibe — Lets anonymous visitors react to countries with emojis on a live world map that shows each country's totals and leaderboard position.“I built a map where countries fight for the internet's approval using five emojis”
- AthleteMatrix — Combines workout, sleep and heart-rate data from Strava, Garmin and Apple Health into one dashboard and suggests daily training sessions with the numbers behind them.“AthleteMatrix - an AI coach that reads Strava, Garmin and Apple Health together, and shows its work”
- snapdok — Renders a URL to a PDF, PNG or JPEG via a single HTTP API call using headless Chromium.“I kept losing a day to "just export it as a PDF", so I spent a week building a URL-to-PDF API”
- Plant Warden — Diagnoses plant diseases and pests from a photo and gives treatment steps, with watering reminders.“I spent the last 3 months building a solo AI plant doctor app in React Native + Fastify – Plant Warden is now live!”
- SteamStats — Shows an overview dashboard of a Steam library and stats, and randomly picks a game from the library.“I built an open-source, self-hosted Steam stats dashboard + random game picker”
- PartyScape — Runs a browser idle MMO with a server-authoritative game engine, and uses an AI agent to handle in-game chat, mechanics questions, bug triage and live fixes.“I vibe-coded a live MMO and now an AI agent runs the live-ops while I sleep”
- SecurityHeaders API — Analyzes a public website's HTTP security headers and returns a score, grade, and improvement suggestions, with side-by-side comparison of up to five sites.“I built an API that analyzes any website's security headers and tells you exactly what needs improving also you can compare with another websites and get security scores. Looking for feedback.”
- Kherad — Hosts a self-hosted internal wiki where edits are saved as git commits behind a non-technical block editor, with merge-request review, cited document Q&A, and AI-drafted pages.“Kherad — an open-source, git-backed wiki with a Notion-like editor and AI agents that draft pages for you”
- Council — Lets users write or speak a private journal entry and get ten archetypal inner-voice reflections on that single entry.“I built a private journaling app where ten "inner voices" read your entry and reflect it back — solo, fully on-device”